Agence France-Presse: World powers must still make tough decisions to agree a global climate pact that will head off the threat of global warming, US Secretary of State John Kerry said Friday.
"We had a very constructive meeting. We made a lot of progress," he said, after talks with summit host, French Foreign Minister Laurent Fabius.
"Progress made last night, a long night, but there's still a couple of very difficult issues we're working on."
Kerry would not be drawn on which issues in particular had become...